Acronema crassifolium Huan C. Wang, X. M. Zhou & Y. H. Wang

WANG, HUAN-CHONG, ZHOU, XIN-MAO, SUN, HANG & WANG, YUE-HUA, 2013, Acronema crassifolium sp. nov. (Apiaceae), a distinct new species from Yunnan, southwest China, Phytotaxa 87 (3), pp. 39-44 : 40-42

publication ID 10.11646/phytotaxa.87.3.1

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Acronema crassifolium Huan C. Wang, X. M. Zhou & Y. H. Wang

sp. nov.

Acronema crassifolium Huan C. Wang, X. M. Zhou & Y. H. Wang View in CoL , sp. nov. ( Figures 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 )

Acronema crassifolium differs from congeneric species in having thick papery leaves,which are homomorphic, ternate and abaxially dark purple; terminal umbels with 8–13 rays; and absent calyx teeth.

Type: — CHINA. Yunnan Province: Luquan County, Jiaozishan Mountains , on alpine meadow, elev. 3800 m a.s.l., 31 October 1964, W. M . Zhu & J. L . Wu 2802 (holotype HYU!, isotype HYU!) .

Erect herbs, glabrous, 6–15 cm tall in flower, 11–32 cm tall in fruit. Tuberous root napiform to conic, tip branched. Stem solitary, ribbed, unbranched or 1–2 branched. Basal and lower leaves petiolate, petioles 3–9 cm long, sheaths short, narrow; blade thickly papery, cordate to broad-cordate in outline, ternate, rarely trilobed, 1.5–4 × 1.8–3.7 cm; leaflets broad ovate, 0.7–2.5 × 0.8–2.2 cm, adaxially green to purple-green, with dense minute papillae, abaxially dark purple, base broad cuneate to rounded, shallowly to entirely trilobed; ultimate lobes entire or 2–3-crenate; basal leaves withering in fruit. Upper leaves decrescent toward apex, sheaths well-developed, petioles 0–5 cm long. Umbels terminal and axillary, 3–4.5 cm across in flower; bracts 3 or absent; bracteoles absent, rarely 1–3; peduncles 2–5 cm long; rays of terminal umbel 8–13, ribbed, unequal, 1–2.5 cm long in flower, 1.5–6 cm long in fruit; rays of axillary umbel 5–9. Umbellules 9–12 mm across, 6–13-flowered; pedicels 3–5 mm long in flower, 5–13 mm long in fruit, unequal, ribbed. Rays and pedicels purplish in fruit. Calyx teeth absent. Petals purple, ovate-lanceolate, ca. 2.8 × 0.5 mm; apex linear, ca. 1.7 mm long, papillate-hairy abaxially. Stamens 5; filaments ca. 0.8 mm long; anthers ca. 0.2 mm long. Fruit broad ovoid to ovoid, ca. 1.5–2.2 × 1.5 mm; ribs 5, filiform.

Additional specimens examined (paratypes): — CHINA. Yunnan Province: Luquan County, Jiaozishan Mountains , 3600–3700 m a.s.l., 23 September 2007, Huan C . Wang, L. F . Shao & K. K . Zhou 1344 ( HYU); ibid., Daheiqing to the top of Jiaozishan , 3500 m a.s.l., 3 August 2008, H . Peng et al. 9312 ( KUN); ibid., Shugu village to Mazonglingliangzhi , 3720 m a.s.l., 5 August 2008, H . Peng et al. 9833 ( KUN); Huize County, Dahai, on alpine meadow, Da-518 ( HYU02039174 ); Dongchuan District , Jiaozishan Mountains , Zhujuanmen Pass , on basalt rocks, 3600–4000 m a.s.l., 13 August 2007, Huan C . Wang, L. F . Shao & K. K . Zhou 817 ( HYU) .

Palynology: —Pollen grains prolate, 21.14 (19.43–22.62) µm × 13.13 (12.33–14.22) µm, P / E ratio approx. 1.63 (1.59–1.73), radially symmetrical, isopolar, tricolpate; shape in polar view triangular. Colpi long and narrow, separated. Surface sculpture rugulate. ( Figure 4 View FIGURE 4 ).

Phenology: — Acronema crassifolium starts to grow leaves in May, flowers from July to August and fruits from mid-September to November.

Habitat and distribution: — Acronema crassifolium is endemic to northern Yunnan, southwest China; up to now it has only been collected at three localities ( Figure 5 View FIGURE 5 ). The new species usually grows in alpine meadows and the understory of Abies forests and Rhododendron thickets, at elevations of 3500–4000 m a.s.l.

Etymology: —The specific epithet crassifolium is derived from the Latin crassus, thick, and folium, leaf, referring to the texture of the leaf.


Naturhistorisches Museum Wien


Botanische Staatssammlung München


University of the Witwatersrand


Nationaal Herbarium Nederland, Leiden University branch


University of Copenhagen


Field Museum of Natural History, Botany Department


Royal Botanic Gardens


University of Helsinki


Kunming Institute of Botany, Chinese Academy of Sciences


Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants


Royal Botanic Garden Edinburgh













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